Who are the four most famous calligraphers in China?

There are many ancient calligraphers in China, among which four famous calligraphers are Ou Yangxun, Liu Zhenqing, Liu Gongquan and Zhao Mengfu, who are representatives of Ou Ti, Yan Ti, Liu Ti and Zhao Ti respectively. There are many masterpieces of calligraphy handed down from generation to generation by Ou Yangxun. His greatest contribution is to summarize the regular script of his former life and form his own unique European style. Yan Zhenqing is the most innovative calligrapher among the four great schools. He can learn from others and form his own unique style. Yan Zhenqing is not only good at regular script, but also has a unique cursive style. Liu Gongquan's calligraphy handed down from generation to generation is mostly copied by later calligraphers, which has high artistic value. His handwriting is powerful and unique. Later generations called Liu Gongquan's regular script and Yan Zhenqing's regular script "Yan Gu". In Zhao Mengfu's calligraphy, Xia Wei is famous for his regular script and running script, and his gentleness and gentleness are his greatest characteristics. (Introduction)